How to use Clock for iPhone and iPad

[iMore.com]

Since the beginning of time itself, humanity has sought an answer to one of life's greatest questions: Do you have the current time?
Clock is one of the original apps that shipped with the original iPhone back in 2007. A world clock, an alarm clock, a stopwatch, and a timer: It lets you keep track of when it is or how long it's been no matter where you are or what you're doing. It wakes you up and makes sure you don't leave anything in the oven long enough to burn. It lets you keep track of your laps or endurance. It makes sure you rest just the right amount of time between sets.

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